Effect of the fertilization on the population of Corythaica cyathicollis in eggplants in function of the collection period

Corythaica cyathicollis (Costa, 1864) is one of the main pests on Solanum melongena and it is known to cause serious damage to the culture. To determine the effect of N and K fertilization on eggplants, a study on the occurrence of C. cyathicollis was developed. Experimental treatments consisted of 3 x 3 x 3 factorial, with four repetitions. Three nitrogen levels (0, 60 and 120kg/ha) and three potassium levels (0, 30 and 60kg/ha) were used. Weekly samplings were carried out during three periods of the day (morning, afternoon and night). The results indicated significant statistical differences in the numbers of insects of the species C. cyathicollis between the plants that had been fertilized with 120kg of N/ha (224.42) and those that had been fertilized with 60kg of N/ha (197.50) in the afternoon.